(19)
(11) EP 0 260 676 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.07.1990 Bulletin 1990/29

(43) Date of publication A2:
23.03.1988 Bulletin 1988/12

(21) Application number: 87113540.6

(22) Date of filing: 16.09.1987
(51) International Patent Classification (IPC)4: H04Q 11/04, H04Q 3/545, H04L 12/54, H04L 12/58, H04M 11/06
(84) Designated Contracting States:
DE FR GB IT SE

(30) Priority: 16.09.1986 JP 215767/86
16.09.1986 JP 215768/86
25.02.1987 JP 40205/87

(60) Divisional application:
94109797.4 / 0621711

(71) Applicant: HITACHI, LTD.
Chiyoda-ku, Tokyo 101 (JP)

(72) Inventors:
  • Sakurai, Yoshito
    Totsuka-ku Yokohama (JP)
  • Gohara, Shinobu
    Totsuka-ku Yokohama (JP)
  • Ohtsuki, Kenichi
    Miura-gun Kanagawa-ken (JP)
  • Kato, Takao
    Sakae-ku Yokohama (JP)
  • Kuwahara, Hiroshi
    Kodaira-shi (JP)
  • Amada, Eiichi
    Kodaira-shi (JP)

(74) Representative: Beetz & Partner Patentanwälte 
Steinsdorfstrasse 10
80538 München
80538 München (DE)


(56) References cited: : 
   
       


    (54) Switching system


    (57) A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules (201 to 208) each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules (100; 1001, 1002) for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways (220 to 223; 230 to 233) each having frames occurring at a predetermined period and time slots contained in each frame to carry blocks.






    Search report